Source note · Enabling mixed mode and encrypted calling in Unified CM
A packet capture of a working SIP TLS trunk shows the TCP handshake, Client Hello, server and client certificate exchange, then encrypted Application Data carrying the SIP signaling.
Checked 2026-09-30
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- verification
- Deployment
- on-premises
- Region
- not restricted
- Release range
- as written (2018)
- Checked
- 2026-09-30
Sources
- Configure SIP TLS Trunk on the Communications Manager with a CA Signed Certificate — Cisco Systems · tier 2 current vendor documentation · Verify
Cite this note
APA
WarmTransfer. (2026, September 30). Enabling mixed mode and encrypted calling in Unified CM: source note cucm-secure-calling-setup-trunk-verify-pcap. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-secure-calling-setup-trunk-verify-pcap
BibTeX
@misc{warmtransfer-claim-cucm-secure-calling-setup-trunk-verify-pcap,
title = {Enabling mixed mode and encrypted calling in Unified CM: source note cucm-secure-calling-setup-trunk-verify-pcap},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-secure-calling-setup-trunk-verify-pcap},
note = {Source note cucm-secure-calling-setup-trunk-verify-pcap, checked 2026-09-30}
}